I finally was able to remove the front passenger seat and found that the rails that slide in the tracks are bent/twisted beyond my ability to straighten them. Looks like they're part of the support assembly and can't be pulled out.

I would like to know if there are any recommendations on where to get replacements?

Also, if I have to buy a complete passenger seat, can the lower part of the seat be used on the driver's side? The springs are bad there and I'd rather not have to buy two replacement seats.

In case I'm not describing the parts correctly I've posted a picture at: http://www.pacificstar.us/mb/rail.jpg

Thank you for any assistance you can provide.